Figure-of-Merit Characterization of Hydrogen-Bond Acidic Sorbents for Waveguide-Enhanced Raman Spectroscopy

Tyndall, Nathan F.; Stievater, Todd H.; Kozak, Dmitry A.; Pruessner, Marcel W.; Roxworthy, Brian J.; Rabinovich, William S.; Roberts, Courtney; McGill, R. Andrew; Miller, Benjamin L.; Luta, Ethan P.; Yates, Matthew Z.

doi:10.1021/acssensors.9b02513

Cited by 18 publications

(7 citation statements)

References 28 publications

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“…Each sorbent is a hydrogen-bond acid designed to target hydrogenbond basic vapors. The group proved for this particular analyte that o1pBPAF has a better performance over HCSFA2 [222].…”

Section: Clad/functionalizedmentioning

confidence: 94%

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Alberti

Datta

Jágerská

2021

Sensors

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On-chip devices for absorption spectroscopy and Raman spectroscopy have been developing rapidly in the last few years, triggered by the growing availability of compact and affordable tunable lasers, detectors, and on-chip spectrometers. Material processing that is compatible with mass production has been proven to be capable of long low-loss waveguides of sophisticated designs, which are indispensable for high-light–analyte interactions. Sensitivity and selectivity have been further improved by the development of sorbent cladding. In this review, we discuss the latest advances and challenges in the field of waveguide-enhanced Raman spectroscopy (WERS) and waveguide infrared absorption spectroscopy (WIRAS). The development of integrated light sources and detectors toward miniaturization will be presented, together with the recent advances on waveguides and cladding to improve sensitivity. The latest reports on gas-sensing applications and main configurations for WERS and WIRAS will be described, and the most relevant figures of merit and limitations of different sensor realizations summarized.

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“…Each sorbent is a hydrogen-bond acid designed to target hydrogenbond basic vapors. The group proved for this particular analyte that o1pBPAF has a better performance over HCSFA2 [222].…”

Section: Clad/functionalizedmentioning

confidence: 94%

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Alberti

Datta

Jágerská

2021

Sensors

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“…We employ a white light characterization technique 14,15 to measure the spectral performance of the edge couplers and the lattice filters. A polarized broadband source (Thorlabs MCWHLP2 for the orange/red bands and Thorlabs SLS201L for the I/Z bands) couples to lensed PM fibers.…”

Section: White-light Characterizationmentioning

confidence: 99%

Waveguide-enhanced Raman spectroscopy using visible laser excitation

Tyndall

Emmons

Pruessner

et al. 2023

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV

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Waveguide-enhanced Raman spectroscopy (WERS) using nanophotonic waveguides has been used to demonstrate the detection of vapor-phase chemicals and liquid-phase biomolecules in water. The technique benefits from the fabrication processes and tolerances of CMOS foundries, but successful foundry-based WERS photonic integrated circuits (PICs) have only been demonstrated using excitation wavelengths of 1064 nm and 785 nm. Foundrybased PICS are beginning to operate with low loss at visible wavelengths, and WERS is uniquely poised to take advantage of this capability. Raman scattering cross-sections scale as λ −4 , so a visible WERS platform could enable increased sensitivity, decreased exposure times, and/or decreased laser powers. However, increased fluorescence, increased waveguide loss, and decreased feature sizes make WERS in the visible challenging. Here, we demonstrate WERS using 300-mm foundry-based fabrication (AIM Photonics) with 633 nm and 785 nm laser excitation. We also show the successful operation and integration of other required components for a compact WERS system operating in the visible, including edge-couplers and lattice filters.

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“…Tyndall et al constructed a 110‐nm SiN thin‐layer waveguide to explore the WERS of four gaseous organic phosphate compounds in the TM mode, 36 and they explained that the source of characteristic peaks and the subtle differences between spectra are caused by hydrogen bonds. Next, they evaluated the optical properties of several hydrogen‐bonded acidic adsorbents using a helical SiN waveguide and estimated their applicability in the detections of gaseous organic phosphorus compounds by WERS spectroscopy 40 . Holmstrom et al used a Si 3 N 4 strip waveguide to realize the Raman detection of trace gas molecules at the concentration of one part per billion (ppb) for the first time 41 .…”

Section: Wers Structure Based On Long‐range Enhancementmentioning

confidence: 99%

Waveguide‐based Raman enhancement strategies

Zhao,

Cao,

et al. 2023

J Raman Spectroscopy

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Waveguide‐enhanced Raman scattering (WERS) is a powerful branch of enhanced Raman technologies that has gained significant progress in recent years because of its advantages, such as reproducibility and robustness. As a complementary tool to surface‐enhanced Raman spectroscopy (SERS), WERS provides a powerful solution for reproducible quantification of analytes. According to different Raman enhancement mechanisms, five major WERS implementation strategies, namely, (1) single‐mode dielectric waveguide, (2) liquid core waveguide, (3) metal cladding waveguide, (4) resonance mirror waveguide, and (5) double metal cladding waveguide, are classified and described in detail in this review. The flexibility of WERS structures makes them easy to be integrated with 2D devices to obtain a complete on‐chip detection scheme, allowing the WERS chip to combine excitation, detection, and data analysis in integrated chips, providing a powerful prospect for real‐time and on‐site analysis of target samples. This article highlights the principles, implementations, and application scenarios of WERS techniques and evaluates their advantages and limitations, respectively. Finally, the strengths and weaknesses of WERS techniques are summarized, and promising future applications are proposed. This review provides a panoramic view for researchers interested in waveguide‐enhanced Raman technology.

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Figure-of-Merit Characterization of Hydrogen-Bond Acidic Sorbents for Waveguide-Enhanced Raman Spectroscopy

Cited by 18 publications

References 28 publications

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Waveguide-enhanced Raman spectroscopy using visible laser excitation

Waveguide‐based Raman enhancement strategies

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